RECON: TNO occultation with 07LG38

Event between 07LG38 and star UC4-474-065504 with event index number of 102136

Geocentric closest approach at 2017/07/05 18:10:24 UTC

J2000 position of star is 17:43:18.9 +04:38:13
Equinox of date position of star is 17:44:10.5 +04:37:48
Stellar brightness R=14.6, use SENSEUP=128
Star is 29 degrees from the moon. Moon is 90% illuminated.
TNO apparent brightness V=23.3

TNO is 34.6 AU from the Sun and 33.7 AU from the Earth.
The TNO is moving 23.1 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 301 seconds.
The 1-sigma cross-track error in the shadow position is 2706 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=160.0 km assuming a 5% albedo -- 6.9 sec chord
Diameter=65.3 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 07LG38, (2017/07/05 18:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:29.0 -26:28:10  0.9 35.85  10
60Bet Oph      17:44:20.3 +04:33:40  2.8  0.08  29
62Gam Oph      17:48:46.3 +02:42:07  3.8  2.24  29
PPM 164438     17:42:48.0 +04:21:34  8.0  0.44  29
60Bet Oph      17:44:20.3 +04:33:40  2.8  0.08  29
07LG38         17:44:10.9 +04:37:48 14.6        29
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 07LG38, (2017/07/05 18:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 35.85  10
60Bet Oph      17:43:28.3 +04:34:05  2.8  0.08  29
62Gam Oph      17:47:53.5 +02:42:25  3.8  2.24  29
PPM 164438     17:41:55.9 +04:22:01  8.0  0.44  29
60Bet Oph      17:43:28.3 +04:34:05  2.8  0.08  29
07LG38         17:43:18.9 +04:38:13 14.6        29
Positions are for J2000

Event circumstances last updated at 2017/05/15 18:00:48 UT

Marc W. Buie, Southwest Research Institute

RECON